Avast! (Windows / Linux, Basic: Free, Premium $ 39.95 per year)

It was created 21 years old, Avast! is a long player in the market for antivirus software. Avast! has built a strong foundation of their philosophy by offering virus protection that is reliable and effective for free for home users. In addition, Avast! offers a variety of protection module which covers many aspects of your computer such as instant messaging, e-mail, P2P applications, and many more.

Microsoft Security Essentials (Windows, Free)

Microsoft Security Essentials is the newest addition to protect Microsoft-based computers. In place of the Windows Live OneCare and Windows Defender to offer more coverage than ever before. Software provided free for all users of Windows and various memberik protection threats such as viruses, malware, adware, and spyware

Avira (Windows, Basic: Free, Premium: $ 30 per year)

Avira is another antivirus application provided free of charge, although a free version of Avira does not offer much compared with other free offers. However, you still can rely on detecting viruses and malware protection, and rootkits. In addition, Avira also offers a Linux Live CD is filled with Avira recovery and system recovery applications are free options to help you to fight the virus.

ESET NOD32 Antivirus (Windows, $ 39.99 per year)

NOD32 has build a large user base over the years by having a small number of false threats and a high detection rate using ThreatSense system.

AVG (Windows, Basic: Free, Premium: $ 54.99 per year

Offer for free from AVG is the lightest, most easy, compared to the others. If you are looking for the most basic antivirus applications that detect spyware, and malware and viruses maintain the website in, AVG is one of the best.

Computer is like a house for our important data. Because inside the computer we save important data, we need to protect it with best protection. As we, all know, now the crime not only happens in the real world. However, also many irresponsibility people with bad intention try to disturb and destroy the important data in our computer, which can it is the thing that decide the future of our business or employee.

Microsoft as bigger company in computer world has aware about this problem. Therefore, they plan to release new antivirus and security protection for patching Windows. This new release is Windows Security Essential as the replacement of the older release, Windows Live OneCare. This new release has lower memory consumable than commercial antivirus like McAfee or Norton. Windows Security Essential actually launch for Net Book user, which is have lower memory specification than PC. This new release will be launch on June 30 at noon. However, the bad news of it, the Microsoft will limiting the download of this free software for just 75000 download.
Many opinions come up about this new release antivirus from Microsoft. Most of them is doubt the capability this software to protect the system. However, it is all up to you. If you feel that your computer well protected with the older version, maybe this release can give you more.